Gedser Water Tower
Gedser, Denmark
Photo: Hubertus45, CC BY-SA 3.0 via Wikimedia Commons
Is a striking and beautiful building with great views, although access to observation is sketchy at best outside the tourist season (Jul-Aug).
© OpenStreetMap contributors
Completed in 1915, designed by Peder Vilhelm Jensen-Klint
The Black Museum
Small geologial museum with local finds, nice collection of Amber and Quartz